To Next PageTo Next PageWhy does the compressor thermal switch open in my Daikin WGZ200DW?
A Daikin Chiller compressor thermal switch might open due to operating beyond design conditions (add facilities so that conditions are within allowable limits) or a discharge valve being partially shut (open valve).
What causes high discharge pressure in Daikin WGZ200DW?
High discharge pressure in your Daikin Chiller can be caused by: * Insufficient condenser water or water temperature being too high; readjust the temperature control or water regulating valve and investigate ways to increase water supply. * Fouled condenser tubes (water-cooled condenser), clogged spray nozzles (evaporative condenser), or a dirty tube and fin surface (air cooled condenser); clean the affected components. * Noncondensables in the system; have the noncondensables purged. * System overcharge with refrigerant; remove excess refrigerant. * Discharge shutoff valve partially closed; open the valve. * Condenser undersized (air-cooled); check condenser rating tables against the operation. * High ambient conditions; check condenser rating tables against the operation.
How to fix low suction pressure on Daikin Chiller?
Low suction pressure in your Daikin Chiller can stem from several issues: * Lack of refrigerant; check for leaks, repair them, and add refrigerant. * A dirty evaporator; clean it chemically. * A clogged liquid line filter-drier; replace the cartridge(s). * Clogged suction line or compressor suction gas strainers; clean the strainers. * A malfunctioning expansion valve; check and reset for proper superheat, replace if necessary. * Condensing temperature too low; check the means for regulating condensing temperature. * Compressor will not unload; see corrective steps for failure of compressor to unload. * Insufficient water flow; adjust the flow.
What causes noisy or vibrating Daikin WGZ200DW Chiller compressor?
A noisy or vibrating Daikin Chiller compressor can be attributed to: * Flooding of refrigerant into the crankcase; check the superheat setting of the expansion valve. * Improper piping support on the suction or liquid line; relocate, add, or remove hangers. * A worn compressor; replace it.
What causes little or no oil pressure in Daikin Chiller?
Little or no oil pressure in your Daikin Chiller can be caused by: * A clogged suction oil strainer; clean it. * Excessive liquid in the crankcase; check the crankcase heater, reset the expansion valve for higher superheat, and check the liquid line solenoid valve operation. * Low oil level; add oil. * Flooding of refrigerant into crankcase; adjust thermal expansion valve.
Critical safety warnings and hazard symbols explained.
Overview of Daikin Applied WGZ water chillers and their features.
Procedures for checking equipment upon receipt for damage or completeness.
Guidelines for placing the chiller in an appropriate indoor or weather-protected area.
Recommended clearances for piping, servicing, and access to unit components.
Safe procedures for handling, lifting, and positioning the chiller unit.
Recommendations for designing and installing chilled water piping systems for optimal performance.
Installation and calibration of flow switches for evaporator and condenser water lines.
Guidelines for using glycol in chilled water systems for freeze protection.
Guidelines for arranging condenser water piping for proper operation and efficiency.
Description of refrigerant circuits and factory-installed piping for packaged units.
Standards and recommendations for designing and installing field refrigerant piping.
Requirements for safe discharge piping of pressure relief valves.
Importance of maintaining water flow rates within specified limits for optimal performance.
Tables and curves detailing pressure drop across condenser for various flow rates.
Tables detailing pressure drop across evaporator for various flow rates.
Detailed physical dimensions and weight specifications for condenserless chiller models.
Recommendations and part numbers for vibration isolation kits and mounting locations.
Comprehensive technical specifications for units without condensers.
Guidelines for single-point power supply wiring, including wire sizing and grounding.
Schematic illustrating field wiring connections for packaged chiller units.
Schematic illustrating field wiring connections for units without condensers.
Identification of components and layout within the chiller's electrical control panel.
Function and operation of the motor protection system for compressor safety.
Detailed description of the MicroTech II controller's software, features, and operator interface.
Explanation of adjustable setpoints for unit operation, including default values and passwords.
Information on unit events, alarms, triggers, and recommended actions for troubleshooting.
Explanation of the Electronic Expansion Valve (EXV) control logic and superheat targets.
Guidance on navigating the controller menus, understanding screens, and performing edits.
Configuration of compressor anti-recycle timers and staging parameters.
Interpretation of green LED flash codes indicating communication or short cycling issues.
Interpretation of red LED flash codes for motor protection and lockout conditions.
Essential checks and preparations required before initial unit start-up.
Step-by-step procedure for safely starting the unit after a prolonged period of inactivity.
Instructions for installing, wiring, and calibrating the flow switch for proper water flow detection.
Logic for compressor staging based on water temperature and timers.
Procedure for automatic pump down when the last compressor shuts off.
How condenser fans are controlled based on discharge pressure for optimal performance.
Guidelines for checking and maintaining compressor oil levels and types.
Procedure for replacing filter-driers to ensure system cleanliness and performance.
Information on adjusting the thermostatic expansion valve for proper superheat control.
A checklist to be completed before submitting the warranty registration form.
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